Update project authors statements to Dartino

pkg/os/lib/system_posix.dart

-// Copyright (c) 2014, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2014, the Dartino project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
 part of os;
 
 const int F_GETFD = 1;
 const int F_SETFD = 2;
 const int F_GETFL = 3;
 const int F_SETFL = 4;
 
@@ skipping 381 matching lines @@
       address += UTSNAME_LENGTH;
       fp = new ForeignPointer(address);
       var machine = cStringToString(fp);
       return new SystemInformation(operatingSystemName, nodeName, release,
                                    version, machine);
     } finally {
       utsname.free();
     }
   }
 }